Superconducting Nanowire Single-Photon Detectors for Quantum Information

Abstract

The superconducting nanowire single-photon detector (SNSPD) is a quantum-limit superconducting optical detector based on the Cooper-pair breaking effect by a single photon, which exhibits a higher detection efficiency, lower dark count rate, higher counting rate, and lower timing jitter when compared with those exhibited by its counterparts. SNSPDs have been extensively applied in quantum information processing, including quantum key distribution and optical quantum computation. In this review, we present the requirements of single-photon detectors from quantum information, as well as the principle, key metrics, latest performance issues and other issues associated with SNSPD. The representative applications of SNSPDs with respect to quantum information will also be covered.

45 pages, 8 figures, 2 tables, accepted by Nanophtonics

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• Laser-lithographically written micron-wide superconducting nanowire single-photon detectors
• Investigating the coherent state detection probability of InGaAs/InP SPAD-based single-photon detectors
• Nanocrystalline superconducting $\gamma$-Mo${}_2$N ultra-thin films for single-photon detectors